I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you count the number of triangles in the picture below?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

What is Luis Suarez's (Soccer Player) favorite tea?

What has to be broken before you can use it?